Several years of focus on welding has now led me to CAA certification for both Oxy Acetylene and TIG welding, certified to BCAR A8-10 for Carbon Steels and Stainless Steels, a sizeable investment but essential skill for aircraft work.

A surprising number of companies carry out this welding without certification, always ask for proof to save trouble down the line for critical components. I can also weld Aluminium in an un-certified capacity, as I haven't had enough request to justify the expense, for just about anything you could want, and have built everything from aircraft undercarriages, to well covers and hangar doors.